lithidionite
noun
li·thid·i·o·nite
lə̇ˈthidēəˌnīt
plural -s
: a mineral (Cu,Na2,K2)Si3O7 consisting of a rare silicate of alkalies and copper
Word History
Etymology
Italian litidionite, from Greek lithidion pebble (diminutive of lithos stone) + Italian -ite